I’ve been doing this for 5 years now, and it’s one of my favorite “life hacks.” Color coding your keys with nail polish. The nail polish creates a wonderful enamel like finish and it lasts a long time. I no longer fumble around my keychain for the right key, I simply look for the color I need and bam! Done. It’s so simple. It only takes about 5 minutes! So, go gather your keys and let’s do this!!